Positioning base unit



FIG. 1 is a front view of a positioning base unit in a firstconfiguration.

FIG. 2 is a back view of a positioning base unit in a firstconfiguration.

FIG. 3 is a right side view of a positioning base unit in a firstconfiguration.

FIG. 4 is a left side view of a positioning base unit in a firstconfiguration.

FIG. 5 is a bottom view of a positioning base unit in a firstconfiguration.

FIG. 6 is a top view of a positioning base unit in a firstconfiguration.

FIG. 7 is a raised perspective view of a positioning base unit in afirst configuration.

FIG. 8 is a lowered perspective view of a positioning base unit in afirst configuration.

FIG. 9 is a front view of a positioning base unit in a secondconfiguration.

FIG. 10 is a back view of a positioning base unit in a secondconfiguration.

FIG. 11 is a right side view of a positioning base unit in a secondconfiguration.

FIG. 12 is a left side view of a positioning base unit in a secondconfiguration.

FIG. 13 is a bottom view of a positioning base unit in a secondconfiguration.

FIG. 14 is a top view of a positioning base unit in a secondconfiguration.

FIG. 15 is a raised perspective view of a positioning base unit in asecond configuration; and,

FIG. 16 is a lowered perspective view of a positioning base unit in asecond configuration.

The broken lines in the drawings represent the bounds of the claim andform no part of the claimed design.

CLAIM The ornamental design for a positioning base unit, as shown anddescribed.